# AI Lingo vs Rootbly

The clearest difference is in-app purchases: AI Lingo at none against Rootbly's 1. AI Lingo also leads on iOS requirement (11.0 vs 16.4). Rootbly's advantage is update cadence (every 9 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Rootbly sells 1 in-app purchase, starting at $5.99 per month. AI Lingo asks for nothing beyond the download.

AI Lingo ships an update every 2 months, Rootbly every 9 days. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | AI Lingo | Rootbly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.5 (2 ratings)](https://appshunter.io/ios/app/rootbly-ai-subtitle/id6761355562/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 9 days** |
| Monetization | — | Free |
| Size | 60 MB | 50 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Clavis Sinica Limited](https://appshunter.io/developer/1635273455) | [Byeongsu KIM](https://appshunter.io/developer/1827219380) |

## What reviewers say

### AI Lingo

[App page](https://appshunter.io/ios/app/ai-lingo/id1665358416)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rootbly

[App page](https://appshunter.io/ios/app/rootbly-ai-subtitle/id6761355562)

Watch foreign YouTube videos with AI-generated translated subtitles in real-time. Paste a URL to get instant subtitles in your preferred language, with options to adjust sync, size, and view original text.

**Highlights:** AI subtitle translation, 15 languages supported, Real-time subtitle display, Subtitle sync adjustment, Customizable subtitle size, YouTube search and browsing, Job progress tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RootblySub Pro | $5.99 | per month |


## Frequently asked questions

### Is AI Lingo free?

AI Lingo is free to download, with no in-app purchases.

### Is Rootbly free?

Rootbly is free to download, with in-app purchases available.

### Do AI Lingo or Rootbly have ads?

Neither AI Lingo nor Rootbly shows ads.

### Which is updated more often, AI Lingo or Rootbly?

AI Lingo ships an update every 2 months, and Rootbly every 9 days. Most recently, AI Lingo was updated on October 27, 2026 and Rootbly on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*